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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
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    <title>Document</title>
</head>
<body>
    <h1>跨域请求-cors</h1>
    <script>
        function fn1(){
            const xhr = new XMLHttpRequest();
            xhr.open('GET', 'http://localhost:8081/api/a', true);
            xhr.onload = function(){
                const res = JSON.parse(xhr.responseText);
                console.log(res);
            }
            xhr.send();
        }

        function fn2(){
            const xhr = new XMLHttpRequest();
            xhr.open('GET', 'http://localhost:8081/api/b', true);
            xhr.onload = function(){
                const res = JSON.parse(xhr.responseText);
                console.log(res);
            }
            xhr.send();
        }

        fn1()
        fn2()
    </script>
</body>
</html>